ASCP MB study guide
ASCP MB · Work through your exam, one topic at a time.
The ASCP Technologist in Molecular Biology (MB) certification - often written MB(ASCP) - is a professional credential for laboratory technologists and scientists who perform molecular diagnostic testing. Candidates are typically medical laboratory science graduates, molecular biology technologists, or research staff moving into a clinical molecular laboratory, and eligibility is governed by the certifying body rather than by any single training route, so prospective candidates should confirm their own eligibility pathway before applying. The ASCP MB study guide has 6 sections and about 1,793 words.
01Molecular Biology Principles, Genetics, and Basic Techniques
Every assay rests on base-pairing rules: adenine pairs with thymine by two hydrogen bonds, guanine with cytosine by three. Higher GC content therefore raises melting temperature (Tm) and buoyant density, and lowers the salt concentration needed to destabilize a duplex.
328 words, about 2 min02Specimen Collection, Handling, and Nucleic Acid Extraction
Choice of tube matters. EDTA (lavender) is the preferred anticoagulant for molecular testing; heparin inhibits Taq polymerase and reverse transcriptase, and citrate dilutes plasma and chelates magnesium.
299 words, about 1 min03Nucleic Acid Amplification, Hybridization, and Detection Methods
PCR requires template, primers, dNTPs, Mg2+ as polymerase cofactor, buffer, and a thermostable polymerase. Cycling is denaturation near 95 °C, annealing about 5 °C below primer Tm, and extension near 72 °C.
293 words, about 1 min04Molecular Detection and Characterization of Infectious Agents
Viral load tests for HIV, HBV, HCV, and CMV report in IU/mL traceable to WHO standards. One log is a ten-fold change.
289 words, about 1 min05Molecular Detection of Genetic, Inherited, and Neoplastic Disease
Variants follow HGVS nomenclature (c. Classification uses the five-tier ACMG/AMP framework: pathogenic, likely pathogenic, variant of uncertain significance, likely benign, benign, weighing population frequency, computational prediction, functional evidence, segregation, and de novo status.
277 words, about 1 min06Quality Assurance, Quality Control, Safety, and Laboratory Operations
Each run needs positive and negative controls, a no-template control, and an internal control to monitor extraction and amplification inhibition (endogenous genes such as RNase P, or exogenous armored RNA). Results are charted on Levey-Jennings plots and judged by Westgard rules: 1-3s and 2-2s are rejection rules, R-4s signals random error, and 4-1s or 10x indicate systematic shift.
307 words, about 2 min